Step by PGC Self-Assessment Test 2020 Test No.5 - MDCATustad

A collection of mdcat, ecat, f.sc, ics and matric examination all subjects MCQs and past papers chapter wise.

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Monday, June 22, 2020

Step by PGC Self-Assessment Test 2020 Test No.5

Step by PGC Self-Assessment Test

Collection of MCQs from Step by PGC Self-Assessment Test collected from mdcat session 2019-20.

STEP Entry Test Preparation (MCAT, BIOLOGY)

All MCQs are collected from past papers of mdcat step by pgc self-assessments test 2019-2020.Step by pgc self-assessment test 2020|step by pgc self-assessment test 2019|step by pgc self-assessment test 2020 syllabus|step.pgc.edu self-assessment| step by pgc self-assessment assignment| step by pgc self-assessment pdf| step by pgc self-assessment center| step by pgc self-assessment examples| step by pgc self-assessment kit| step by pgc self-assessment questions.

STEP ENTRY TEST SELF ASSESSMENT BIOLOGY 2020

2.           The carbon-carbon bonds in unsaturated carbon compounds
              a            Single (-) only
              b            Double only (=)
              c            Triple ( = ) only
              d            Double ( = ) or triple ( = )
3.           Condensation means
              a            Removal of water
              b            Addition of water
              c            Removal of hydrogen
              d            Addition of hydrogen
4.           The monomers of proteins are
              a            Amino acids
              b            Nucleotides
              c            Amino acids & nucleotides
              d            Monosaccharides
5.           Which one of following is incorrect about carbohydrates
              a            Contain C, H, & O
              b            Contain no hydroxyl group
              c            All are aldehydes or ketones
              d            Cx(H2O)y is general formula
6.           In monosaccharides, all the carbon atoms except one have a
              a            Aldehyde group
              b            Keto group
              c            Aldehyde or keto group
              d            Hydroxyl group
7.           Glyceraldehyde is
              a            Triose
              b            Tetroses
              c            Pentose
              d            Hexose
8.           Monosaccharides are
              a            Reducing sugars
              b            Non reducing sugar
              c            Reducing and non reducing sugars
              d            Oxidizing sugar
9.           Glycosidic bond between two monosaccharides in
              a            1,2 linkage
              b            1,4 linkage
              c            2,1 linkage
              d            4,1 linkage
10.        The main source of carbohydrates for animals
              a            Glycogen
              b            Starch
              c            Glycogen & starch
              d            Cellulose
11.        With iodine, cellulose gives
              a            Red color
              b            Blue color
              c            Pink color
              d            No color
12.        Lipids are
              a            Water soluble organic substances
              b            Water soluble inorganic substance
              c            Water insoluble organic substances
              d            Water insoluble inorganic substances
13.        Lipids are formed by condensation reaction between
              a            Fatty acid & alkane
              b            Fatty acid & alcohol
              c            Fatty acid & alkene
              d            Fatty acid & alkyne
14.        The General formula of fatty acids is
              a            R. COOH
              b            R. COH
              c            COOH
              d            R. HCOOH
15.        In animals, the fatty acids are
              a            Branched
              b            Ringed
              c            Branched or ringed
              d            Straight
16.        Which one of following is incorrect about fats & oils
              a            Lighter than water
              b            Specific gravity about 0.8
              c            Both are liquid at room temperature
              d            Are not crystalline except some
17.        Which one of following is correct about phospholipid molecule
              a            Polar head containing fatty acid
              b            Non polar tail containing fatty acid
              c            Polar tail containing phosphate
              d            Non polar head containing phosphate
18.        Lecithin is
              a            Phosphatidylchaline
              b            Phosphatidic acid
              c            Phospholipid molecule
              d            Wax
19.        All of followings are Terpenoids except
              a            Terpene
              b            Choline
              c            Rubber
              d            Steroids
20.        Phosphatidic acid is composed of
              a            Glycerol & 2 fatty acid
              b            2 fatty acids and a phosphoric acid
              c            Glycerol, 2 fatty acid & nitrogenous base
              d            Glycerol, 2 fatty acid, & a phosphoric acid
21.        Types of amino acids in cells & tissues
              a            20          b            25
              c            120       d            170
22.        The variable part of an amino acid
              a            R-group
              b            NH2
              c            COOH
              d            Hydrogen atom
23.        In Alanine, R is
              a            Hydrogen
              b            Hydroxyl
              c            CH3
              d            NH3
24.        In proteins amino acids are joined together by
              a            Ionic bonds
              b            Peptide bonds
              c            Disulphide & hydrogen bonds
              d            Ionic, disulphide, hydrogen, hydrophobic
25.        Proteins always contain the elements
              a            C, H, O
              b            C, H, O, N, S
              c            C, H, O, N
              d            C, H, O, N, S
26.        The potential variety of protein because
              a            R group of amino acids
              b            NH2 group of amino acid
              c            COOH group of amino acid
              d            Specific sequence of amino acids
27.        The most abundant organic molecule of a cell
              a            Carbohydrate
              b            Proteins
              c            Lipids
              d            Water
28.        The first person of work out the complete amino acid sequence of a protein was
              a            F. Sanger
              b            F. Miescher
              c            Erwin Chargaff
              d            Francis crick
29.        The types of proteins in the human body
              a            20
              b            25
              c            120
              d            In thousands
30.        B-pleated sheet is an example of
              a            Primary structure
              b            Secondary structure
              c            Tertiary structure
              d            Quarternary structure
31.        The globule proteins are
              a            Tertiary structure containing 3 types of bonds
              b            Tertiary structure containing 4 types of bonds
              c            Quarternary structure containing 3 types of bonds
              d            Quarternary structure containing 4 types of bonds
32.        Haemoglobin shows a strcutre
              a            Primary
              b            Secondary
              c            Tertiary
              d            Quarternary
33.        Denaturation of proteins is the loss of
              a            Amino acids from protein
              b            Sequence of amino acids
              c            3-dimensional shape of protein
              d            Sequence & shape
34.        Enzymes are the most important group of
              a            Carbohydrates
              b            Proteins
              c            Fats
              d            Carbohydrates & proteins
35.        If the non-protein part of enzyme is covalently bonded, it is known as
              a            Co-factor
              b            Co enzyme
              c            Activator
              d            Prosthetic group
36.        The presence of enzymes does not affect the nature of
              a            Substrate
              b            Product
              c            Substrate & product
              d            ES complex
37.        Every enzyme reacts with substrate by virtue of its
              a            Shape
              b            Concentration
              c            Shape & concentration
              d            Specificity
38.        An enzyme and its substrate react with each other through
              a            Globular shape
              b            Active site
              c            Reaction site
              d            Passive site
39.        Lock and key model of enzyme action was proposed by
              a            F. Miescher
              b            F. Sanger
              c            Koshland
              d            Emil Fischer
40.        The reaction rate is directly proportional to the substrate available if the
              a            Concentration of substrate is high
              b            Concentration of substrate is low
              c            Concentration of enzyme is low
              d            Concentration of enzyme & substrate is low
41.        Heat provides
              a            Activation energy
              b            Kinetic energy
              c            Activation & kinetic energy
              d            Kinetic & potential energy
42.        Optimum pH for Enterokinase is
              a            4.50      b            5.50
              c            6.80      d            7.60
43.        An inhibitor is a chemical substance which
              a            Can not react with enzyme
              b            Can react with enzyme & is transformed into products
              c            Can react with enzyme but is not transformed into product
              d            Can or can not react with enzyme
44.        Enzymes are composed of hundreds of
              a            Nucleic acids
              b            Amino acids
              c            Phosphoric acids
              d            Fatty acids
45.        The enzymes which carry out the synthesis of proteins are integral part of
              a            Ribosomes
              b            Mitochondria
              c            Chloroplast
              d            Cytoplasm
46.        The active site of an enzyme consist of region
              a            One      b            Two
              c            Three   d            Four
47.        If there is no effect on already occurring enzymetic reaction on adding more substrate it is
              a            Denaturation
              b            Saturation
              c            Inhibition
              d            Composition
48.        The rate of enzyme catalyzed reaction
              a            Decreases as substrate concentrations increases      
              b            Is constant under all conditions
              c            Can be reduced by inhibitors
              d            Can not be measured
50.        Which statement about enzymes is not true
              a            Sensitive to heat
              b            Non-specific in action
              c            Change the rate of catalyzed reaction
              d            Consists of proteins

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